(Complex present value) How much do you have to deposit today so that beginning 7 years from now you can withdraw $10,000 a year for the next 6 years (periods7 through 12) plus an additional amount of $20,000 in that last year (period 12)? Assume an interest rate of 13 percent. a. What is the value of the $10,000 withdrawals in years 7 through 12 at the end of year 6 if the annual interest rate is 13 percent? S(Round to the nearest cent.) b. What is the present value today of the 6-year $10,000 annuity at the end of year 6 (found in part a) if the annual interest rate is 13 percent? S (Round to the nearest cent.) c. What is the present value of the amount of $20,000 withdrawal in year 12 if the annual discount rate is 13 percent? (Round to the nearest cent.) d. How much do you have to deposit today so that beginning 7 years from now you can withdraw $10,000 a year for the next 6 years (periods 7 through 12) plus an additional amount of $20,000 in that last year (period 12)? S(Round to the nearest cent.)